US · guidance
CMS Pub. 100-04, ch. 14, § 50
ASC Procedures for Completing the ASC X12 837 Professional
Claim Format or the Form CMS-1500
(Rev.11793; Issued:01-19-23; Effective: 02-21-23; Implementation: 02-21-23)
The Place of Service (POS) code is 24 for procedures performed in an ASC.
Prior to January 1, 2008, Type of Service (TOS) code is “F” (ASC Facility Usage for
Surgical Services) is appropriate when modifier SG appears on an ASC claim. Otherwise
TOS “2” (surgery) for professional services rendered in an ASC is appropriate.
Beginning January 1, 2008, ASCs no longer are required to include the SG modifier on
facility claims in Medicare. The contractors shall assign TOS code “F” to codes billed by
specialty 49 for Place of Service 24.
History
(Rev.11793; Issued:01-19-23; Effective: 02-21-23; Implementation: 02-21-23)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
dc8f7c31c85164ebd7fee298814572b48ec3fa5c49f4298d3af003fb81f5f8f4
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